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Precise orbit and baseline determination for maneuvering low earth orbiters

Ju, Bing and Gu, Defeng and Herring, Tom and Allende-Alba, Gerardo and Montenbruck, Oliver and Wang, Zengming (2017) Precise orbit and baseline determination for maneuvering low earth orbiters. GPS Solutions, 21 (1), pp. 53-64. Springer. doi: 10.1007/s10291-015-0505-x. ISSN 1080-5370.

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Orbital maneuvers are usually performed as needed for low earth orbiters to maintain a predefined trajectory or formation-flying configuration. To avoid unexpected discontinuities and to connect pre- and postmaneuver arcs with a minimal set of parameters, a maneuver has to be considered in the routine GPS-based orbit determinations. We propose a maneuver handling method in a reduced-dynamic scheme. With the proper thrust modeling and numerical integration strategy, the effects caused by orbital maneuver can be largely eliminated. The performance for both single-satellite precise orbit determination (POD) and inter-satellite precise baseline determination (PBD) is demonstrated using selected data sets from the Gravity Recovery and Climate Experiment (GRACE) mission. For the POD results, the orbit determination residuals indicate that the orbit with maneuver modeling is well fit to the GPS observations. The external orbit validation shows that the GRACE-B orbits obtained from our approach match the DLR reference orbits better than 3 cm (3D RMS), which is comparable to the result of the maneuver-free GRACE-A satellite. For the PBD results, on average 87 % of double-difference phase ambiguities can be resolved to integers and an RMS of the K-band ranging system residuals of better than 0.7 mm can be achieved, even though the orbital maneuver was performed on the spacecraft. Furthermore, the actual maneuver performance derived from the POD and PBD results provides rigorous feedback on the thruster system, which is not only beneficial for current maneuver assessment but also for future maneuver plans.

Item URL in elib:https://elib.dlr.de/100280/
Document Type:Article
Title:Precise orbit and baseline determination for maneuvering low earth orbiters
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Ju, BingNat. Univ. Def. Tech.UNSPECIFIED
Gu, DefengNat. Univ. Def. Tech.UNSPECIFIED
Wang, ZengmingNat. Univ. Def. Tech.UNSPECIFIED
Journal or Publication Title:GPS Solutions
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 53-64
Keywords:Maneuver, Precise orbit determination, Precise baseline determination, LEOs, GPS
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space System Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Space System Technology
DLR - Research theme (Project):R - Vorhaben Infrastruktur und Unterstützung für Raumflugbetrieb (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Space Operations and Astronaut Training
Deposited By: Montenbruck, Dr.rer.nat.hab. Oliver
Deposited On:07 Dec 2015 14:05
Last Modified:25 Jan 2017 15:51

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